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  • NIB NOS Date Matched Pair Sylvania USA 7F8 [] Get Vacuum Tubes 100+%

NIB NOS Date Matched Pair Sylvania USA 7F8 [] Get Vacuum Tubes 100+%

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Product Description

Tube Type / Number: 7F8
Actual Brand*: Sylvania
Printed Brand: Federal
Quantity of Tubes: Date Matched Pair
Plate Construction:
Getter Construction: Top []
Country of Manufacture: USA
Visible Date Codes: L6P/FBG [2]
Lettering Condition: 90 Percent
Year Made:
Number of Mica Spacers: 1
Mica Shape: Round
Smoked Glass? Clear
Engraved Base? No
Boxes Included? Multiple Boxes - ALL Original

Gm Test Results: 66/56 & 58/62

Minimum Good Value: 25/25
NOS Test Value: 41/41
Life Calculation: 100+% (where 65% = fail)

Tests as NOS?: Yes
True NOS?*: Yes

** Please note, many tubes will test NOS but will actually have a few hours of use on them. A truly NOS tube will have excellent getter flashing condition, no dirt/grime, usually in the original box, and no filament deposits. If a tube is listed  as "tests NOS" but is listed as "not True NOS" please expect the tube to have a small amount of use *

All tubes have been tested using only the best tube testers. We have a large fleet of tube testers, and every single one of them has been calibrated within the last year by industry experts. We mainly use the Hickok TV-7D/U, but occasionally we may use a Hickok 539, 533A, or 600A.

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